A paralegal at the New Jersey U.S. Attorney’s Office used government computers to identify people who were possibly helping authorities and posted a video on YouTube of her gang member son’s co-defendant talking to investigators, according to court filings. Tawanna Hilliard pleaded not guilty at her arraignment Tuesday in Brooklyn federal court to an indictment charging her with offenses, including witness tampering, obstruction of justice and obtaining information from a government computer, according to officials. Hilliard’s son, Tyquan, a member of the 5-9 Brims set of the Bloods street gang serving a 10 year prison term for robbery in New...